Device for extracting drills, &amp;c.



PATENTED APR. 21, 1903.

2 SHEETS-SHEET 1 an 00" 6.1% flora, 72,

c. A. HORAN. DEVICE FOR EXTRAGTING DRILLS, 65c.

' APPLICATION FILED APR. 7.

N0 MODEL.

FIG-l 'PATENTED APR. 21, 1903.

c. A. HORAN. DEVICE FOR EXTRAGTING DRILLS, 8w.

APPLIOATION FILED APR. 7, 1902.

N0 MODEL.

2 SHEETS-SHEET 2.

illllllll ii ii THE NORRIS PETERS CO PNOTOLITNCL. WASHINGTON D. C.

' NITED STATES PATENT OFF-ICE.

CHARLES A. HORAN, OF STOCKTON, CALIFORNIA.

DEVICE FOR EXTRACTING DRILLS, 80C.

SPECIFICATION forming part of Letters Patent No. 725,844, dated April21, 1903.

Application filed April 7 1902. Serial No. 101,801. (No model.)

To alZ whom it may concern..-

Be it known that I, CHARLES A. HORAN, a citizen of the United States,residing at Stockton, in the county of San Joaquin and State ofCalifornia, have invented certain new and useful Improvements in Devicesfor Extracting Drills, &c.; and I do declare the following to be a full,clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame.

This invention relates to a device for extracting drills, drill rods,tools, &;c., from wells.

The object of the invention is to provide a simple and efiectiveconstruction of device by means of which. drills, drill rods, and toolsof various kinds which have dropped down into a well or become detachedfrom the drill-rod, or the point of a drill which has been broken offfrom the shank of the drillbit, may be grappled for from the surface andconveniently and expeditiously gripped and removed, the particularpurpose of the invention being to devise a tool which is especiallyadapted for engaging objects disposed in awkward positions and founddifficult of removal by ordinary extractors of this character.

WVit-h this and other objects in view, which will readily appear as thenature of the invention is better understood, the same consists incertain novel features of construction and combination and arrangementof parts, which will be hereinafter fully described, defined in theappended claim, and illustrated in the accompanying drawings, in which-Figure 1 is a vertical section through a well, illustrating theoperation of the invention in gripping and extracting a brokendrill-bit. Figs. 2 and 3 are respectively a side elevation and avertical section of the lower portion of the extractor. Fig. 4 is ahorizontal section. Fig. 5 is a bottom plan view. Fig. 6 is a sideelevation of a modified form of grapplinghook. Fig. 7 is a bottom planview of the same.

Referring now more particularly to the drawings, the numeral 1designates the stock of the tool, which is preferably tubular in formand may be composed of a single pipe or rod or a series of pipe or rodsections, according to the depth of the well in which it is inserted forthe extraction of drills or tools, said sections being coupled togetherin any preferred manner. The lower end of this stock carries a pendentcage 2, comprising a ring or band 3 of like internal diameter throughoutand a series'of spaced arms 4., integral with the lower edge of the ringor band and secured at their upper ends to the lower end of the stock,said arms preferably being outwardly curved or deflected to adapt thering or band to be made of a greater diameter than the lower end of thestock to admit of the ready insertion and removal of the drills or toolsengaged by the grapplers. Hinged or pivoted, as shown at 4, to two ofthe said arms 3 are clutches 5, consisting, preferably, of plates in theform of flap-valves, said plates being provided withsegmentally-recessed gripping edges 6, which are beveled or inclined toform biting portions to firmly engage the object to be extracted. Theouter opposite side edges of these plates rest upon seats formed by theupper edge of the ring 3 between the arms and are notched at 7 adjacentto their free engaging edges to receive the intermediate arms 3 andtopermit of the clutches coming together in close relation. These clutchesare adapted to tilt upwardly to permit of the passage of the drill orother object to be extracted into the cage and then to tilt downwardlyunder the Weight of the object or pull thereon to firmly grip saidobject, thereby enabling the same to be withdrawn from the well.

Projecting below the ring or band 3 is a shank 8, which is formed orprovided at its lowerend with a hook 9, arranged horizontally andextending at right angles thereto. This hook serves as a means forengaging the object'to be grappled and holding the same in positionWhile the extractor is being moved downward to cause the object to passinto the cage and to project upward between the clutch devices to enablethe latter to grip or clutch said object in the manner described.

In the operation of the device the extractor is inserted into the welluntil the hook 9 reaches a point adjacent the object to be withdrawnfrom the Well, when the hook is drawn into engagement with the objectand the device properly manipulated to cause said hook to bring theobjectsay a drill or rod-to an upright position and to maintain it insuch position while the extractor is being moved downward until theupper end of the drill or object passes between the two clutch devicesinto the cage, whereupon an upward pull is exerted to lift the objectfrom off the bottom of the well and to cause the clutches to firmlyengage the same, Whereupon the drill or object may be readily removed.In this manner a drill, drill-rod, or broken drill-point or a series ofconnected rods may be gripped and withdrawn from the well. When theobject to be withdrawn is in an inclined or leaning position, theextractor is moved to bring the hook 9 into engagement therewith and todraw the object to a substantially vertical position, this action beingpromoted by turning or rotating the extractor to center the object, whenthe extractor is lowered until the object is gripped by the clutchdevice, whereupon it may be withdrawn. The operation of the extractor inthis connection is clearly indicated in full and broken lines in Fig. lof the drawings.

In Figs. 6 and 7 I have shown a modified form of grappling-hook, whichis especially adapted for use in removing tools and other small objects.In this construction of the grapple the shank is provided with a pair ofparallel side arms 10, which are connected at their lower ends to thehook 11, which is of substantially U form in general outline, one of theends of the hook terminating in a point 12 and the other end in aguiding-lip 13, the purpose of the point being to engage the object andthe lip to guide the same into the throat or passage between said lipand the point until the object enters the body of the hook and issecurely gripped, when the extractor is lifted to withdraw said object.

From the foregoing description, taken in connection with theaccompanying drawings, itis thought that the construction, operation,and advantages of my improved extractor will be readily apparent withoutrequiring a more extended explanation.

Various changes in the form, proportion, and the minor details ofconstruction may be resorted to without departing from the principle orsacrificing any of the advantages of this invention.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

A grappling device consisting of a stock, a cage applied to the lowerend of the stock and comprising a thin sheet-metal band of uniformdiameter provided with two pairs of diametrically-opposed arms integralwith its upper edge and extending upwardly therefrom and connected attheir upper ends to the stock, bearing-pieces upon the inner faces ofone pair of the arms, a pair of clutch-plates having journals pivotallymounting them upon the bearings and notched in their edges to clear thearms, whereby the plates are adapted to seat on the upper edge of thesheetmetal band, said plates being provided with segmentally-recessedbeveled biting edges at their free ends, such edges conjunctivelyforming an elliptical opening, and a horizontal grappling-hook carriedby the cage, substantially-as described.

In testimony whereof I have hereunto set my hand in presence of twosubscribing witnesses.

CHARLES A. HORAN.

WVitnesses:

A. H. McCLoUD, W. J. HORAN.

